the game play is interesting, build an army and defeat the enemy, though, this could get an easy 4/5 if a few things was added, the difficulty is a bit unbalanced, all you have to do is upgrade a warlock, and you can complete the first few levels with just that warlock, and for mage users, there should be a mana upgrade for magic users, in the upgrade panel, and as suggested before, the upgrade points should be for each unit, not shared, the starting money of each level can be a bit low, the starting gold should increase by about 5% for each level, for example, the first level you start with 40 gold, the second level you start with about 45 gold, the third level, you should start with 50 gold, etc. the customization is quite low in this game, there is only 5 upgrades for units, and 8 upgrades for your hero, add at least 2 more hero upgrades, such as an interest upgrade per kill or increased exp gain for level completed, or something, and the mana upgrade for magic units.